Cellular phone and mobile switching controller
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United States of America Patent
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-
May 29, 2012
Grant Date -
May 6, 2010
app pub date -
Jan 11, 2010
filing date -
Dec 9, 2005
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In a case where a cellular phone exists outside a WOS system service area, the cellular phone receives a not-connectable signal and an audio message from a mobile switching controller. The cellular phone conducts disconnection processing with the not-connectable signal as a turning point. Moreover, the cellular phone stores an extension number and converts a dedicated special number into an external number for retransmission, thus establishing connection to a PBX. After the reception of a connection-accepted signal and an automatic exchange answer message from the PBX, the cellular phone automatically transmits the stored extension number.
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